Figure 4.
Cable Length of the NI 9478 with a Capacitor and Diode
Load
NI 9478
COM
Vsup
DO
+
–
External
Power
Supply
Cable
Clamp
Cable
Length
Note
NI recommends that you use a capacitor with a
capacitance of at least 20 µF.
I/O Protection
The NI 9478 provides protection against overcurrent and short-
circuit conditions.
Overcurrent Protection
The NI 9478 provides two configurable current limit thresholds,
Limit A and Limit B. The device monitors each output channel.
NI 9478 Getting Started Guide
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© National Instruments
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15
